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I have vx involved as I think 2nd gear can be a bit “iffy” for precise selection. Is there an upgrade clutch option out there? Even if it means I pay some towards.

My car is the same with gear changes from 1st to 2nd and sometimes 2nd to 3rd. I find that it depends how you hold the gearstick as you change. Been doing it since I bought the car but I haven't bothered about it.

My car is the same with gear changes from 1st to 2nd and sometimes 2nd to 3rd. I find that it depends how you hold the gearstick as you change. Been doing it since I bought the car but I haven't bothered about it.

Yes - sachs has an uprated clutch kit which should be more than capable of handling the torque on a mapped car. I believe Thorney have done quite a few clutch upgrades for members on here.

I had the uprated clutch fitted last June, handles the power great. I found that Courtenay Sport were the cheapest to buy it from as well as the flywheel. You have to get the uprated slave cylinder direct from Sachs.

Very much a pattern here. Same issues with selection as on the Astra and a clutch that can’t handle the power (as it were). If they are to replace then I might do a deal with the stealer to upgrade it all.

Very much a pattern here. Same issues with selection as on the Astra and a clutch that can’t handle the power (as it were). If they are to replace then I might do a deal with the stealer to upgrade it all.

I believe it is the same gearbox, the F40 and indeed the same clutch in the Astra and Insignia - the same clutch as they use on the lower diesel model. And as the naming suggests, the F40 isn’t built for the power, it is only rated for 400 Nm. Which is also why the VXR/OPC has reduced power output in 1st and 2nd gear... and a hamstrung torque curve.

I think it is down to the same basic issue as the Haldex: unlike other manufacturers of performance models, GM doesn’t bother with using uprated components. The clutch, the gearbox and the rear diff are off the shelf components from lower models and not designed for high power, high utilization applications.

I believe it is the same gearbox, the F40 and indeed the same clutch in the Astra and Insignia - the same clutch as they use on the lower diesel model. And as the naming suggests, the F40 isn’t built for the power, it is only rated for 400 Nm. Which is also why the VXR/OPC has reduced power output in 1st and 2nd gear... and a hamstrung torque curve.

I think it is down to the same basic issue as the Haldex: unlike other manufacturers of performance models, GM doesn’t bother with using uprated components. The clutch, the gearbox and the rear diff are off the shelf components from lower models and not designed for high power, high utilization applications.

Absolutely. The f40 gen 1 was th sealed unit found on the likes of vectra VXR...when they made th item serviceable it became the troublesome box of today. Trouble is....they never really accept that fact.
The haldex itself is a pretty robust piece of kit but does require regular oil changes that you need to request during a wet service....mine is being done soon as a matter of upkeep.

the uprated slave... is that because theres extra pressure needed for releasing the uprated backplate springs that would otherwise wreck an oem slaves seals.
Sachs list 1 slave for these cars.... is it the correct one? https://www.sachsperformance.com/en/...r-613182600188